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Multi-phase solvers: Improved handling of inflow/outflow BCs in MULES

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Avoids slight phase-fraction unboundedness at entertainment BCs and improved
robustness.

Additionally the phase-fractions in the multi-phase (rather than two-phase)
solvers are adjusted to avoid the slow growth of inconsistency ("drift") caused
by solving for all of the phase-fractions rather than deriving one from the
others.
This commit is contained in:
Henry Weller
2017-01-17 22:43:47 +00:00
parent 1abec0652d
commit 1c2093c8b3
24 changed files with 214 additions and 606 deletions
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13
applications/solvers/multiphase/twoPhaseEulerFoam/twoPhaseSystem/twoPhaseSystem.C
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@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2013-2016 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2013-2017 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -444,7 +444,7 @@ void Foam::twoPhaseSystem::solve()
)
);
phase1_.correctInflowFlux(alphaPhic1);
phase1_.correctInflowOutflow(alphaPhic1);
if (nAlphaSubCycles > 1)
{
@ -515,8 +515,7 @@ void Foam::twoPhaseSystem::solve()
fvc::interpolate(phase1_.rho())*phase1_.alphaPhi();
phase2_.alphaPhi() = phi_ - phase1_.alphaPhi();
alpha2 = scalar(1) - alpha1;
phase2_.correctInflowFlux(phase2_.alphaPhi());
phase2_.correctInflowOutflow(phase2_.alphaPhi());
phase2_.alphaRhoPhi() =
fvc::interpolate(phase2_.rho())*phase2_.alphaPhi();
@ -525,6 +524,12 @@ void Foam::twoPhaseSystem::solve()
<< " Min(" << alpha1.name() << ") = " << min(alpha1).value()
<< " Max(" << alpha1.name() << ") = " << max(alpha1).value()
<< endl;
// Ensure the phase-fractions are bounded
alpha1.max(0);
alpha1.min(1);
alpha2 = scalar(1) - alpha1;
}
}